Computer Chess Club Archives


Search

Terms

Messages

Subject: bugs and strength of programs

Author: Inmann Werner

Date: 15:57:30 09/19/98


Something "nice" happened to Inmichess.

By putting everything I heard from in, I also put some bugs into my program.
Although it is fast, has a nice evaluation and all kind of stuff, it played
sometimes really strange. In Tschoops summer Tournament, it got 4 points in
eleven rounds.

I looked to change the evaluation function to play better, most the pawn
evaluation... but nothing, really nothing changed. I got angry and set some
variables incredible high and  ... nothing happened. Some Nights later, I found
one variable set to 1 instead to zero. This variable disabled all (really all!)
pawn evaluation in the middle game.

The really strange thing is, that Inmichess with this bug did not really play
bad. There were some nice games and I, on the first look, never thought, that
there is no pawn evaluation at all.

When I fixed the bug, I thought, Inmichess now will play "much" stronger. But
the effect was about 100 Elo at all. (estimated by auto232 games)

Maybe evaluation is not so important, as I thought (since the bugfix, my program
is much slower), or the pawn evaluation is silly (i dont think so) or there are
other strange bugs.


A small "computer programmers brain damage report" from

Werner







This page took 1.85 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.